STEVAL-CCA019V1 STMicroelectronics, STEVAL-CCA019V1 Datasheet - Page 18

• Manufacturer Part Number: STEVAL-CCA019V1
• Description: BOARD EVAL AUDIO AMP FOR TS4982
• Manufacturer: STMicroelectronics

Specifications of STEVAL-CCA019V1

• Amplifier Type: Class AB
• Output Type: 2-Channel (Stereo) with Stereo Headphones
• Max Output Power X Channels @ Load: 2W x 2 @ 4 Ohm; 125mW x 2 @ 16 Ohm
• Voltage - Supply: 5.0V
• Operating Temperature: -40°C ~ 85°C
• Board Type: Fully Populated
• Utilized Ic / Part: TS4982
• Description/function: Audio Amplifiers
• Operating Supply Voltage: 5 V
• Output Power: 2 W
• Product: Audio Modules
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: TS4982
• Other names: 497-10339

Application information
18/31
The power delivered by the supply voltage is:
Then, the power dissipated by each amplifier is:
and the maximum value is obtained when:
and its value is:
This maximum value only depends on the power supply voltage and load values.
The efficiency, η , is the ratio between the output power and the power supply:
The maximum theoretical value is reached when:
– V
– V
PEAK
PEAK
= V
= V
CC
CC
/2 for the headphone part, so that:
for the loudspeaker part, so that:
P diss
Doc ID 14527 Rev 2
P supply
P diss
P
=
dissmax
2 2V
----------------------- -
=
η
π
=
=
P supply P
η
η
=
=
R
∂
-------------------- - = 0
-------------------- - =
P
V
∂
P diss
CC
L
supply
CC
P
P
=
π
-- -
4
π
-- -
8
out
out
=
=
⋅
2V
------------ -
π
⋅
2
78.5%
39.3%
–
R
I
cc
CC
2
P
L
out
------------------------ -
out
π
AVG
4V
V
–
PEAK
CC
P
(
out
W
(
)
(
W
W
)
)
(
W
)
TS4982